In the Feb. 16 SN: Robots roll into the classroom, brain zaps for severe depression, particle colliders of the future, how to walk like a tetrapod, sleepless nights boost Alzheimer's proteins and more.

Alzheimer's plaques due to purging flaw

Disease-related gene controls clearance of plaque protein

The high-risk version of a gene associated with Alzheimer’s disease hinders the brain’s ability to clear out a troublesome protein, a new study finds.

Researchers have known that people who carry the e4 version of the gene APOE are at higher risk for Alzheimer’s disease and more likely to have cell-killing plaques in their brains than people who have the e3 or e2 versions. But it hasn’t been clear

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